Michael Herman caught onto WinFS’s real nature last year and I'm just now catching up. He points to a paper describing ontologies and points out this about WinFS: "WinFS is a knowledge repesentation, storage and synch system ...a literal implementation of a system strongly based on ontology related concepts." For the basics of ontologies for our new world-to-be, Michael recommends Ontology Development 101: A Guide to Creating Your First Ontology.
